Patents Assigned to Hitachi Industrial Equipment Systems Co., Ltd.
  • Oil-cooled gas compressor
    Patent number: 10001124
    Abstract: An oil-cooled gas compressor provided with a compressor body, an oil separator that separates out oil from a compressed gas, a gas pipe for sending the compressed gas, from which oil has been separated out by the oil separator, to a user, and an oil pipe for returning, to the compressor, the oil separated out by the oil separator. An air-cooled heat exchanger for cooling the aforementioned oil, a controllable-speed cooling fan for blowing cooling air at said air-cooled heat exchanger, and a waste-heat-recovery heat exchanger, provided upstream of the air-cooled heat exchanger, for recovering heat from the oil flowing through the abovementioned oil pipe, are also provided. The speed of the cooling fan is controlled so as to bring the temperature of the compressed gas discharged from the compressor body to within a prescribed range.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: June 19, 2018
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Masahiko Takano, Hideharu Tanaka
  • Fluid machine
    Patent number: 9964107
    Abstract: A fluid machine includes a piston, a valve seat plate, a valve, and a valve retainer that reduces an opening amount of the valve. One end of the valve retainer is fixed with a fastener together with the valve to the valve seat plate. The fastener spans through the one end of the valve retainer and the valve to thereby fasten the one end of the valve retainer and the valve to the valve seat plate. A second end of the valve retainer that is opposite to the one end does not contact the valve seat plate.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: May 8, 2018
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Kosuke Sadakata, Koichi Tashiro, Kazutaka Suefuji
  • Oil-free screw compressor coated with a base resin, a solid lubricant and a heat-resistant additive
    Patent number: 9944880
    Abstract: In order to prevent deterioration in performance of an oil-free screw compressor and scuffing caused by rust, surfaces of both male and female rotors are coated with heat-resistance coatings containing a solid lubricant. A coating contains Polyimide resin to which Molybdenum disulfide, as a solid lubricant, and Aluminum oxide and Titanium oxide, as additives, are added. Accordingly, it is possible to realize a coating that is higher in heat resistance and longer in lifetime than a conventional one.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: April 17, 2018
    Assignees: HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD., KAWAMURA RESEARCH LABORATORIES, INC.
    Inventors: Yukiko Ikeda, Kazuaki Shiinoki, Masakatsu Okaya, Natsuki Kawabata, Masahiro Kawamura, Iwao Aoki
  • Axial-type rotary electric machine
    Patent number: 9935510
    Abstract: An axial-type rotary electric machine that improves a torque and an efficiency relative to a size of a rotor is provided. The axial-type rotary electric machine is provided with a stator having a stator core, and a rotor facing the stator along an axial direction of a rotation axis passing through the stator. The rotor includes a permanent magnet arranged so as to face the stator core in the axial direction of the rotation axis, a yoke arranged so as to face the stator core across the permanent magnet, and a support member supporting the yoke. The support member includes a protrusion protruding so as to face a side surface of the permanent magnet that is on the farther side to the rotation axis.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: April 3, 2018
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Hirooki Tokoi, Yuji Enomoto, Toshifumi Suzuki, Shuichi Takahashi, Kenichi Souma
  • Railroad vehicle
    Patent number: 9919722
    Abstract: A railroad vehicle includes a plurality of vehicle units, a cable, and a disconnector. In the plurality of vehicle units respective vehicles are coupled. The cable is placed astride the vehicles to connect the power supply unit of each vehicle unit. The disconnector is installed at some midpoint in the cable and electrically separates the vehicle units from one another.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: March 20, 2018
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Kenji Tsuchiya, Ayumu Morita, Makoto Watanabe, Yoshinori Shimada, Hideo Kitabayashi, Wataru Murata
  • Reactor device
    Patent number: 9899135
    Abstract: Provided is a device that reduces loss by means of a large-capacity, three-phase reactor device that eliminates high-frequency components arising in a power controller system used in solar power generation and the like. The present invention is provided with: a yoke core that uses an amorphous ribbon; magnetic leg cores formed into a fan shape using an amorphous ribbon; and a coil wound around the magnetic leg cores.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: February 20, 2018
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Kenji Nakanoue, Naoyuki Kurita
  • Compressor
    Patent number: 9897103
    Abstract: To improve the exhaust heat recovery efficiency, a compressor includes a heat exchanger for cooling a gas, coolant, water, or oil heated by the compressor during compressor operation by heat exchange with a working fluid, for circulating the working fluid of a Rankine cycle. The Rankine cycle is implemented by the heat exchanger, an expander, a condenser, and a circulating pump to circulate the working fluid through the cycle.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: February 20, 2018
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventor: Yuji Kamiya
  • Cantilevered-shaft electric motor
    Patent number: 9853518
    Abstract: This cantilevered-shaft electric motor has no bearing on the load side, and since there also is no end bracket, which is present in ordinary electric motors, the internal stator and rotor are in an unprotected state in a bare state. The present invention provides a cantilevered-shaft electric motor that prevents damage to the stator and rotor during transport, causes handling properties during transport and during coupling to a load side to be favorable, and prevents contaminants from infiltrating. The cantilevered-shaft electric motor is provided with: a stator that is affixed at the inner diameter side of a housing; and a rotor that is rotatably borne disposed facing the inner peripheral side of the stator. The cantilevered-shaft electric motor has a structure such that the rotor is provided with a bearing at the reverse side from the load and the shaft at the load side is supported at an apparatus side.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: December 26, 2017
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Tsutomu Miyoshi, Kenji Yajima
  • Inkjet recording device
    Patent number: 9849687
    Abstract: This invention is intended to provide a ink-jet printing device which can detect leak of ink or solvent without the exclusive sensor for leak detection and without increasing cost. An ink jet printing device for printing letter by ejecting ink, comprising, a liquid container for containing ink or solvent, a surface level sensor for detecting surface level arranged on the liquid container, a control unit and a display unit, wherein the display unit displays indication in the case where the surface level change time detected by the control unit using the surface level sensor is larger than the settled surface level change time in settled printing condition is provided for solving the problem.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: December 26, 2017
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Manabu Katou, Nobuhiro Harada, Masahiko Sakuraba, Takehiko Matsushita
  • Switch
    Patent number: 9818562
    Abstract: Provided is a reliable switch having a contact surface that is prevented from being roughened. To solve the problem, there is provided a switch including a plurality of switching units 2 and 3 each including a fixed electrode and a movable electrode that is disposed to be opposed to the fixed electrode and is closed or opened with respect to the fixed electrode, the switch being characterized in that the switching units 2 and 3 each make or break a current to be applied to the switch, the switching units 2 and 3 are electrically connected in series to each other, and the switching units 2 and 3 are each configured such that a first switching unit 3 is first closed, and then a second switching unit 2 is closed.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: November 14, 2017
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Takashi Sato, Ayumu Morita, Makoto Yano, Kenji Tsuchiya, Akio Nakazawa
  • Position identification device and mobile robot provided with same
    Patent number: 9804605
    Abstract: Position identification means (7) for estimating the position of a mobile robot (1) includes a laser distance sensor (6) that measures a distance from the mobile robot (1) to an object, means for recognizing an object from data of the measured distance from the mobile robot (1) to the object and map data, travel area storage means (12) for storing a travel area of the mobile robot (1), specified area storage means (13) for storing a specified area that is separate from the travel area of the mobile robot (1), and object determination means (14) for determining whether an object is present within the travel area of the mobile robot (1) that is stored in the travel area storage means (12).
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: October 31, 2017
    Assignee: Hitachi Industrial Equipment Systems, Co., Ltd.
    Inventors: Ryoso Masaki, Shuichi Maki, Takuya Naka, Kazuto Shirane, Kohsei Matsumoto
  • Scroll-type fluid machine with grease-lubricated orbiting bearing
    Patent number: 9790943
    Abstract: A scroll-type fluid machine reduces intrusion of abrasion powders, generated by sliding of a conductor causing an orbiting scroll side and a fixed scroll side to be conducted, into a compression chamber, and improves reliability of a compressor. The scroll-type machine includes a casing, a fixed scroll having a flange surface attached to the casing, and a wrap portion provided at an end plate, an orbiting scroll having a wrap portion provided at the end plate, and provided in an opposed relationship with the fixed scroll, a drive shaft connected through a crank portion to the orbiting scroll, an orbiting bearing, a face seal portion arranged between the orbiting scroll and the fixed scroll, a cooling fan, and an orbiting scroll side conductive brush.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: October 17, 2017
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Kiminori Iwano, Yoshio Kobayashi, Natsuki Kawabata, Toshikazu Harashima, Shumpei Yamazaki
  • Liquid container coupled to a refill container and ink-jet recording apparatus having same
    Patent number: 9757949
    Abstract: A liquid container includes a coupling part that is configured to engage with a refill liquid container. The coupling part includes a pipe unit that, when the liquid container is in use, is projected upward in a vertical direction of the liquid container. The coupling part also includes a plane part that is disposed around the pipe unit.
    Type: Grant
    Filed: May 1, 2015
    Date of Patent: September 12, 2017
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Naomichi Yoshida, Akira Miyao, Takehiko Matsushita
  • Oil free screw compressor
    Patent number: 9752582
    Abstract: Provided is a highly reliable oil free screw compressor including a first sensor for detecting a temperature of lubrication oil, second sensors for detecting temperatures of intake air, and a cooling fan controller having a storage portion storing therein a set temperature of lubrication oil and a set temperature of intake air, and a computing portion for computing a control signal for increasing the speed of the cooling fan if a detected value of a temperature of the lubrication oil, delivered from the first sensor, becomes higher than the set value of lubrication oil stored in the storage portion, and computing a control signal for increasing the speed of the cooling fan if a detected value of a temperature of the intake air, delivered from the second sensor, becomes higher than the set temperature of the intake air, stored in the storage portion.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: September 5, 2017
    Assignee: HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
    Inventors: Hideki Fujimoto, Hitoshi Nishimura
  • Gas-liquid separator and inkjet recording apparatus using the same
    Patent number: 9744769
    Abstract: A gas-liquid separator includes a casing with a cylindrical chamber inside, a gas-liquid 2-phase inlet pipe which is attached to a wall of the casing and connected to the chamber, a gas outlet pipe for discharging the gas of a gas-liquid mixture flowing into the chamber, and the gas-liquid 2-phase outlet pipe for discharging the liquid as a most part of the gas-liquid mixture flowing into the chamber. A gap is formed around the gas-liquid outlet pipe in the chamber for separating the mixture into liquid and gas using the surface tension and suction force. The gas-liquid separator is installed in the inkjet recording apparatus, especially in the print head. The print head is filled with the solvent gas so as to be suctioned from the gutter to reduce the solvent consumption.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: August 29, 2017
    Assignee: HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
    Inventors: Takahiro Arima, Akira Miyao, Mitsuo Igari, Mamoru Okano, Tomohiro Inoue
  • Replenishment container and inkjet recording device comprising same
    Patent number: 9738079
    Abstract: The purpose of the present invention is to provide a replenishment container and an inkjet recording device that are capable of reducing staining by ink or a solvent during ink or solvent replenishing. The replenishment container comprises a storage member having an opening formed therein and having a storage chamber that stores ink or solvent, a stopper member that seals the opening of the storage member, and a lid member that covers the stopper member. The replenishment container is characterized by: comprising a seal member that has a throughhole between the stopper member and the lid member; the lid member having a throughhole that is opened concentrically with the throughhole of the seal member; and the inner diameter of part or all of the throughhole in the seal member being smaller than the inner diameter of the throughhole in the lid member.
    Type: Grant
    Filed: November 29, 2013
    Date of Patent: August 22, 2017
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Takehiko Matsushita, Naomichi Yoshida, Akira Miyao, Nobuhiro Harada
  • Cartridge-type inkjet recording device
    Patent number: 9738086
    Abstract: The objective of the present invention is to provide a cartridge-type inkjet recording device that can accurately and easily connect a cartridge-type replenishing liquid bottle to an inkjet recording device. This cartridge-type inkjet recording device having a liquid reservoir to which a replenishing liquid bottle can be attached/removed is characterized by the liquid reservoir having: a liquid replenishment opening for replenishing liquid from the cartridge-type replenishing liquid bottle; a cam that is provided to the periphery of the liquid replenishment opening, engages a portion of the cartridge-type replenishing liquid bottle, and moves the cartridge-type replenishing liquid bottle in the vertical direction; and a cam operation section that operates the cam.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: August 22, 2017
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Naomichi Yoshida, Akira Miyao, Takehiko Matsushita
  • Water lubricated screw compressor
    Patent number: 9732751
    Abstract: In a water-supply line for performing water-supply to the rotors and the mechanical seal of a compressor, or in a condensed-water collection line for collecting condensed water of a dryer into the inlet port of the compressor, a water reservoir is provided at a position higher than the water-supply unit of the compressor. Moreover, there are provided a start-time water-supply line and a solenoid valve set up therein. Here, the start-time water-supply line establishes the connection between the lower portion of the water reservoir, and the inlet port of the compressor and the water-supply unit of the mechanical seal.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: August 15, 2017
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Fumio Takeda, Masayuki Kasahara, Takehiro Matsuzaka, Tsutomu Nozaki, Hideharu Tanaka
  • Transformer housing
    Patent number: D809457
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: February 6, 2018
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Miki Yamazaki, Manabu Dohi, Eisuke Maruyama, Ryosuke Mikoshiba, Kenichi Souma
  • Transformer housing
    Patent number: D809458
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: February 6, 2018
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Miki Yamazaki, Manabu Dohi, Eisuke Maruyama, Ryosuke Mikoshiba, Kenichi Souma